XML 42 R27.htm IDEA: XBRL DOCUMENT
v3.22.0.1

FEES PAID BY THE FUND AND RELATED PARTY TRANSACTIONS (Details) | 12 Months Ended
--- | ---
Dec. 31, 2021 USD ($) | Dec. 31, 2020 USD ($) | Dec. 31, 2019 USD ($)
Fees Paid and Related Party Transactions [Line Items] |  |  |
Investor tax reporting cost | $ 670,000 | $ 587,711 | $ 752,399
Directors fees and expenses | 81,479 | 83,030 | 70,739
Licensing fee incurred | 50,610 | 60,330 | 45,507
UNG and the Related Public Funds |  |  |
Fees Paid and Related Party Transactions [Line Items] |  |  |
Directors fees and expenses | $ 1,081,963 | 585,896 | 556,951
UNG |  |  |
Fees Paid and Related Party Transactions [Line Items] |  |  |
Monthly fee obligated to pay on average daily total net assets, maximum base fee 1,000,000,000 (as a percentage) | 0.60 |  |
Average daily total net assets | $ 1,000,000,000 |  |
Monthly fee obligated to pay on average daily total net assets (as a percentage) | 0.50 |  |
Directors fees and expenses | $ 81,479 | 83,030 | 70,739
Licensing Agreements [Member] |  |  |
Fees Paid and Related Party Transactions [Line Items] |  |  |
Fee percentage | 0.015% |  |
United States Oil Fund LP [Member] |  |  |
Fees Paid and Related Party Transactions [Line Items] |  |  |
Ongoing Registration Fees and Other Offering Expenses | $ 103,290 | $ 364,200 | $ 144,440

X
- Definition Amount of daily average total net assets outstanding. + References No definition available. + Details
Name: | ung_AssetsUnderManagementAverageDailyBalanceBaseAmountForFeePercentage
Namespace Prefix: | ung_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Percentage of fee obligated to pay by UNG that are greater than average daily total net assets. + References No definition available. + Details
Name: | ung_BaseFeeAmountGreaterThanAverageDailyTotalNetAssetsOf1000000000BaseFeePercentage
Namespace Prefix: | ung_
Data Type: | xbrli:pureItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage of fee obligated to pay by UNG on maximum average daily total net assets. + References No definition available. + Details
Name: | ung_BaseFeeAmountMaximumAverageDailyTotalNetAssetsOf1000000000BaseFeePercentage
Namespace Prefix: | ung_
Data Type: | xbrli:pureItemType
Balance Type: | na
Period Type: | duration

X
- Definition Base Fee Percentage + References No definition available. + Details
Name: | ung_BaseFeePercentage
Namespace Prefix: | ung_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Fees Paid and Related Party Transactions [Line Items] + References No definition available. + Details
Name: | ung_FeesPaidAndRelatedPartyTransactionsLineItems
Namespace Prefix: | ung_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Its represents the value of license fees and other offering expenses. + References No definition available. + Details
Name: | ung_LicenseFeesAndOtherOfferingExpenses
Namespace Prefix: | ung_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Registration Fees And Other Offering Expenses + References No definition available. + Details
Name: | ung_RegistrationFeesAndOtherOfferingExpenses
Namespace Prefix: | ung_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Noninterest expense related to directors' fees which are fees paid by an Entity to its directors. Directors' fees may be paid in addition to salary and other benefits. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 220 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04.14) -URI http://asc.fasb.org/extlink&oid=120399700&loc=SL114874048-224260 + Details
Name: | us-gaap_NoninterestExpenseDirectorsFees
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of general expenses not normally included in Other Operating Costs and Expenses. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.6) -URI http://asc.fasb.org/extlink&oid=123367319&loc=SL114868664-224227 + Details
Name: | us-gaap_OtherGeneralExpense
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis=ung_FundTrustsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis=ung_UnitedStatesNaturalGasMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_TypeOfArrangementAxis=us-gaap_LicensingAgreementsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=ung_UnitedStatesOilFundLimitedPartnershipMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |